Mack, a channel man through and through, pitched up at Northamber in October 2010 to oversee development of audio-visual-related products from vendors that now include Acer and, er, 3M.

Prior to joining Northamber, he spent the best part of a decade in the AV sector with Reflex, Colourgen, Mission Control EFX and BBG Distribution. Even further back in time, Mack was sales director at reseller Rapid Recall, joint managing director at Computer 2000, and chief operating officer at another Basingstoke-based distributor Datrontech.

His exit comes months after Northamber brought on board industry veteran Peter Hammet as chief executive in a bid to improve declining sales and turn losses into profits.

In fiscal 2012 ended June 20, Northamber posted sales of £101m, down 16.5 per cent on the prior year, and a net loss of £2,000.

Then at the half way point of fiscal 2013, ended 31 December, sales slid 22 per cent year-on-year to £41.5m. In the distie's recently reported fiscal Q3 numbers, sales fell by a fifth versus the year ago quarter.

Hammet has a job ahead to rebuild the vendor portfolio after Northamber recently split from IBM, Kingston Technology and Fujitsu, as well as Toshiba, Cisco and Microsoft in previous years.